Elsevier

Physics Letters B

Volume 107, Issues 1–2, 3 December 1981, Pages 35-38
Physics Letters B

Evidence for alpha-cluster structure at 12.9 MeV CM in the 12C + 16O system

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Abstract

The excitation functions for inelastic scattering to the 0+, 6.05 MeV and 3, 6.13 MeV levels in 16O have been measured with high resolution from 12.2 to 13.5 MeV c.m. in the 12C + 16O system at θlab = 14.5° and 30°. The data display a broad (Γcm∼700 keV), Jπ = 6+ resonance centered at ∼12.9 MeV for the 0+ state but appear featureless for the 3 state. In addition, and contrary to all expectations, the yeilds to the 0+ and 3 levels are similar on resonance. These results indicate that the entrance channel resonance has an α-cluster structure.

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